nyse euronext. unlocking the world's potential. >>> south korean rapper psy's hot hit gangnam style shot him to fame, but his anti-u.s. remarks made a lot of people upset. he has apologized, and at least one person seems to have forgiven him. that one person is -- well, nischelle turner is live to tell us who it is. >> reporter: it's a big name, a pretty big name. it seems president obama is okay with psy, and despite the previous anti-american remarks made by the rapper, his performance at a holiday concert on sunday attended by the president went on as planned. unless you have absolutely no internet access or haven't been out of the house in a long time, you probably heard his mega hit gangnam style, which is breaking records on youtube. a controversial performance by psy, which was shot roughly eight years ago, has spread like wildfire online. in it, the rapper calls for the death of american troops serving in iraq, not long after news of a slaying of a south korean hostage by iraqi insurgents. t